cts: remove LevelBalancer as it was replaced by LatencyBalancer

Signed-off-by: arthurjolo <[email protected]>

Author: arthurjolo

src/cts/BUILD

@@ -18,7 +18,6 @@ cc_library(
         "src/CtsObserver.h",
         "src/HTreeBuilder.h",
         "src/LatencyBalancer.h",
-        "src/LevelBalancer.h",
         "src/SinkClustering.h",
         "src/TreeBuilder.h",
         "src/Util.h",
@@ -40,7 +39,6 @@ cc_library(
         "src/CtsOptions.cpp",
         "src/HTreeBuilder.cpp",
         "src/LatencyBalancer.cpp",
-        "src/LevelBalancer.cpp",
         "src/SinkClustering.cpp",
         "src/TechChar.cpp",
         "src/TreeBuilder.cpp",

src/cts/src/CMakeLists.txt

@@ -14,7 +14,6 @@ add_library(cts_lib
     TechChar.cpp
     TritonCTS.cpp
     Clustering.cpp
-    LevelBalancer.cpp
     LatencyBalancer.cpp
     CtsOptions.cpp
 )

src/cts/src/CtsOptions.h

@@ -228,8 +228,6 @@ class CtsOptions : public odb::dbBlockCallBackObj
     return macroSinkClustersSizeSet_;
   }
   unsigned getNumStaticLayers() const { return numStaticLayers_; }
-  void setBalanceLevels(bool balance) { balanceLevels_ = balance; }
-  bool getBalanceLevels() const { return balanceLevels_; }
   void setNumStaticLayers(unsigned num) { numStaticLayers_ = num; }
   void setSinkBuffer(const std::string& buffer) { sinkBuffer_ = buffer; }
   void setSinkBufferInputCap(double cap) { sinkBufferInputCap_ = cap; }
@@ -328,7 +326,6 @@ class CtsOptions : public odb::dbBlockCallBackObj
   bool macroMaxDiameterSet_ = false;
   unsigned macroSinkClustersSize_ = 4;
   bool macroSinkClustersSizeSet_ = true;
-  bool balanceLevels_ = false;
   unsigned sinkClusteringLevels_ = 0;
   unsigned numStaticLayers_ = 0;
   std::vector<std::string> bufferList_;

src/cts/src/LevelBalancer.cpp

@@ -27,7 +27,6 @@
 #include "CtsOptions.h"
 #include "HTreeBuilder.h"
 #include "LatencyBalancer.h"
-#include "LevelBalancer.h"
 #include "TechChar.h"
 #include "TreeBuilder.h"
 #include "db_sta/dbNetwork.hh"
@@ -280,19 +279,6 @@ void TritonCTS::buildClockTrees()
     builder->initBlockages();
     builder->run();
   }
-
-  if (options_->getBalanceLevels()) {
-    for (auto& builder : builders_) {
-      if (!builder->getParent()
-          && !builder->getChildren().empty()
-          // don't balance levels for macro cell tree
-          && builder->getTreeType() != TreeType::MacroTree) {
-        LevelBalancer balancer(
-            builder.get(), options_, logger_, techChar_->getLengthUnit());
-        balancer.run();
-      }
-    }
-  }
 }
 
 void TritonCTS::initOneClockTree(odb::dbNet* driverNet,
@@ -500,8 +486,7 @@ void TritonCTS::writeDataToDb()
     int minDepth = 0;
     int maxDepth = 0;
     bool reportFullTree = !builder->getParent()
-                          && !builder->getChildren().empty()
-                          && options_->getBalanceLevels();
+                          && !builder->getChildren().empty();
 
     std::unordered_set<odb::dbITerm*> sinks;
     builder->getClock().forEachSink([&sinks](const ClockInst& inst) {

src/cts/src/LevelBalancer.h

@@ -197,12 +197,6 @@ set_sink_buffer(const char* buffer)
   getTritonCts()->setSinkBuffer(buffer);
 }
 
-void
-set_balance_levels(bool balance)
-{
-  getTritonCts()->getParms()->setBalanceLevels(balance);
-}
-
 void
 report_characterization()
 {

src/cts/src/TritonCTS.cpp

@@ -113,8 +113,9 @@ proc clock_tree_synthesis { args } {
     set distance $keys(-macro_clustering_max_diameter)
     cts::set_macro_clustering_diameter $distance
   }
-
-  cts::set_balance_levels [info exists flags(-balance_levels)]
+  if { [info exists flags(-balance_levels)] } {
+    utl::warn CTS 129 "-balance_levels is obsolete."
+  }
 
   if { [info exists keys(-sink_clustering_levels)] } {
     set levels $keys(-sink_clustering_levels)

src/cts/src/TritonCTS.i

@@ -8,7 +8,6 @@ COMPULSORY_TESTS = [
     "array_ins_delay",
     "array_no_blockages",
     "array_repair_clock_nets",
-    "balance_levels",
     "check_buffers",
     "check_buffers_blockages",
     "check_buffers_blockages_merge",

src/cts/src/TritonCTS.tcl

@@ -11,7 +11,6 @@ or_integration_tests(
     array_ins_delay
     array_no_blockages
     array_repair_clock_nets
-    balance_levels
     check_buffers
     check_buffers_blockages
     check_buffers_blockages_merge